She reportedly went back to the Premier Inn Haverfordwest but couldn't get into her room.
Police dropped her home after she became abusive.
However, drunk and high on cocaine, Georgina went to her mother's house, where she took her mum's car and a petrol canister back to the hotel.
Wales Online reports that Nicola Powell, prosecuting, said: "She took the keys to her mother's Peugeot car without her mother's knowledge, took a petrol canister from a lawn mower and drove back to the Premier Inn where she doused the fire escape door with petrol and set it alight."
A total of 133 guests were evacuated at 6.30am, and the blaze was put out by a firefighter staying at the hotel.
According to the Mirror, Tranter was arrested soon after by police at a garage near the hotel. She admitted arson being reckless as to whether life would be endangered and has been remanded in custody for the past seven months.
According to the BBC, Judge Peter Heywood said she had been jilted in a "somewhat brutal and callous way" but that did not excuse her behaviour. He told her: "You were clearly unhinged at being jilted."
Tranter, a refinery lab technician, will also likely lose her job. James Jenkins, defending, said: "An arsonist cannot return to testing petroleum spirit."
Britain's best bargain hotels 2015
Jailed: Woman who set fire to Premier Inn after boyfriend dumped her
Lawton Court Hotel is a beautifully restored Victorian town house ideally located opposite the pier on Llandudno promenade. "Take note Llandudno – this is how it should be done,” says one reviewer. Double room from £77 per night.
The Queens Promenade Hotel is perfectly located on Blackpool's seafront. This hotel prides itself in offering guests comfortable and good value accommodation and its regular sessions of live entertainment. Double room from £50.
The Lauriston is a small family run and family-friendly hotel located opposite the pier on Llandudno promenade. Reviewers recommend this hotel for its child-friendliness. "Great location, perfect for families". Double room from £76.
This small Victorian country house hotel and restaurant is set in the heart of the Lakes and on the edge of Grasmere Village. Tripadvisor also ranks the Grasmere Hotel seventh for "best service" worldwide and ninth for "romance" in Europe. Double room from £57 B&B.
The New Guilderoy Hotel is a family-run hotel where guests can enjoy the spaciousness of a larger hotel with the hospitality of a B&B. One TripAdvisor reviewer praises the service and hospitality thus : "Come a guest leave a friend is an excellent way to describe your stay here." Double room from £40 pp B&B.
Castlecroft bed & breakfast is situated right below Stirling Castle and boasts great views over the Carse of Stirling and the countryside. "Amazing location, walking distance to town. Lovely accommodation, cosy, clean and comfortable. Delicious breakfast,cooked to order, homemade bread. Laura was so kind and knowledgeable, we can't wait to return!" Double room from £65 (including breakfast).
The Elm Tree Hotel offers boutique style accommodation with lovely views of the Llandudno seafront. Facilities include a beautifully landscaped patio garden, a gym and games room. Double room from £75.
The Wellington offers sweeping views of Llandudno bay and good access to Snowdonia. The hotel is credited for its helpful staff. "Very homely and the staff are friendly. Nothing was not to much to trouble and they made our stay outstanding," one reviewer wrote. Doubles from£50.
Fairhaven is a family-owned Edwardian guest house in Goathland set in the North Yorkshire Moors National Park, one of the most beautiful areas of Britain. One TripAdvisor reviewer described it as "the most amazing guest house ever". Double room from £89
Dolffanog Fawr is an 18th Century farmhouse in Snowdonia that has recently been thoroughly renovated. The owners pride themselves on creating the perfect bed and breakfast accommodation and an exceptionally high standard of comfort and cleanliness. Reviewers seem to think that they achieve this admirably. Double room from £50 B&B.
Can-Y-Bae was built in 1861 as a seaside holiday home for a wealthy Victorian merchant family. Now it offers fully refurbished guest accommodation. "Loved the theatrical décor in the bar and the total ambiance is fantastic. The room was tastefully decorated with a really comfortable bed." Double room from £80.
The Maples Hotel is a family-friendly hotel on Blackpool Promenade. It was entirely refurbished during the summer of 2013. This place gets rave reviews. "If you want to go to Blackpool when definitely stay here because you are very well looked after," says one. Double room from £60 including breakfast.
Hen-Dy Hotel is a small family-run establishment which provides warm hospitality in a clean, relaxed and friendly environment. Many guests return again and again with over reviewer saying: "Another excellent break at our favourite North Wales hotel." Double room from £39 including breakfast.
Park Farm, on the outskirts of Newcastle upon Tyne, participated in the Channel 4 TV programme Four in a Bed from which they emerged the winners. Enough said. Double room from £70.
The Caribbean Hotel offers cheap accommodation in Doncaster just a short walk from the city centre and the Doncaster Racecourse. Praised for its decent prices, one reviewer says: "For somewhere with a bit of character and hospitality, the Caribbean suited me perfectly. Double room from £29.95.
Sea Wood Bed and Breakfast is a family run business located on the edge of the Lake District with stunning views of Lancashire and Cumbrian Fells. Sea Wood Bed and Breakfast prides itself in giving special offers, discount and long term deals. Double room from £65.
The Queens Hotel in Girvan, Ayrshire is close to the high street and gets rave reviews. "Rooms were lovely, great friendly atmosphere in the bar and the breakfast was one of the best I have had in any hotel. Amazing value for money and struggling to find anything even remotely negative to say." Double from £35pp including breakfast.
Belmore Court Motel is situated in the centre of Enniskillen town at the gateway to the Fermanagh lakes and North West coastline. One reviewer described the motel using just one word: "excellent". Double room from £65.
Dolafon Guest House is located in the village of Llanberis ,just a short walk from Snowdon Mountain Railway. This beautiful grade II listed building was built of locally quarried granite in the 1860s. It is now a family business that prides itself on its comfortable rooms and friendly service. Double room from £56.
Southside Bed & Breakfast is just a short walk from Tenby town centre and award winning South Beach. One reviewer described the hotel as “a jewel in the crown of Tenby”. Double room from £40.
Haseley Coach House Motel is located in the heart of Warwickshire in a peaceful yet convenient setting.
“A good spot to re-charge,” says one reviewer. Double room from £59.50.
Easthill Farm House offers self-catering accommodation holidays in the picturesque village of Thornton-Le-Dale, near Pickering in North Yorkshire. There's range of private self-contained self-catering apartments, including an old coach house and converted stable. Guests can enjoy the hot tub, barbeque area, tennis court, crazy golf, play park and many more family friendly activities in the gardens. From £160 per week.
Barons Court Hotel is a family owned hotel in Wolverhampton located just minutes from the city centre. The hotel is praised by Tripadvisor reviewers for its service and staff.
“Excellent Staff, Service and Facilities”. Double room £45
The adult-only The Pier Hotel sits on the quiet east side of Rhyl. This is all about the sea view rooms, perfect for those in search of a coastal retreat and romantic getaways. Rooms from £30.
The Oak Bank Hotel has two AA Rosettes for Culinary Excellence and the quality of the food constantly surprises both first time guests and regulars. Rooms from £86pp.