Yes, there are likely many such fanfictions in the Percy Jackson fandom. Fanfiction writers often explore different romantic scenarios between beloved characters like Percy and Annabeth.
It depends on how it's written. If it's just a sweet, innocent kiss within the context of a developing relationship in the fanfiction, it could be considered appropriate for young audiences with parental guidance. However, if there are other more mature themes associated with it, then it might not be.
I'm not sure of specific titles off - hand. But you can start by looking on popular fanfiction platforms like Archive of Our Own. Use the search terms 'Percy and Annabeth kiss in bed' to find relevant stories.
The popularity might stem from the fact that it shows a significant development in their relationship. Fans of the characters are often interested in seeing their relationship progress, and a kiss in bed can be a very intimate and exciting moment for them to read about.
Celebrating Years GIFs were a type of emoticon package and dynamic picture that received much attention in Celebrating Years. These animations could show the different emotions and personalities of the characters in the play, making people more interesting and cute when using them. Although the search results did not provide specific gifs for celebrating the New Year, one could use relevant software such as Waifu2x, Dain/Cain/Rife, Squirrel-Rife, etc. to fill in the gif frames and generate high-quality intermediate frames to create gifs for celebrating the New Year.
A gif graphic novel is a type of graphic novel that incorporates gifs (Graphics Interchange Format). It combines the visual storytelling elements of traditional graphic novels with the dynamic, moving elements of gifs. This can add an extra layer of action, emotion, or atmosphere to the story. For example, a fight scene in a gif graphic novel might use gifs to show the characters' movements in a more fluid way compared to static images in a regular graphic novel.
Posting a GIF on Story is easy. You basically go to the Story creation area, find the button for adding stuff like pictures or GIFs. Once you click that, choose your GIF from your files and it'll upload. Just keep in mind that sometimes there might be restrictions on the size or type of GIF that can be posted.