It depends on your personal taste. If you like the dynamic between Gabriel and Sam in the Supernatural series, then it could be really good. It might explore their relationship in new and interesting ways through text exchanges.
You can try searching on popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. They have a large collection of Supernatural fanfictions, and you might be able to find the specific one about Gabriel texting Sam there.
One common theme is their unique relationship dynamic. Since Gabriel is an archangel and Sam is a hunter, there's often a play between power and vulnerability. Another theme is the idea of redemption for Gabriel through his interactions with Sam.
You can start by looking on Archive of Our Own (AO3). It has a large collection of Supernatural fanfictions, including those focused on Sam and Gabriel. Fanfiction.net is also a good place to search.
Well, a popular Gabriel Supernatural fanfiction is 'Gabriel's Hidden Powers'. It's exciting as it explores powers of Gabriel that were not fully shown in the show. Then there's 'Gabriel and the Winchesters', which is all about his interactions with Sam and Dean. It has some really great dialogue that feels true to the characters. Also, 'The Real Gabriel' is a fanfic that tries to uncover the true nature of Gabriel, peeling back the layers of his character in an interesting way.
One great Gabriel fanfiction is 'The Trickster's Gambit'. It delves deep into Gabriel's character, showing his complex nature between his trickster side and his more serious, protective side. Another one is 'Gabriel's Redemption Arc' which focuses on his journey to make up for his past mistakes in the Supernatural universe. And 'A Day in the Life of Gabriel' gives a really fun and light - hearted look at what his daily existence might be like among the other characters.
A popular fanfiction in this category is 'Gabriel and His Soulmate's Destiny'. It starts with Gabriel being a bit skeptical about the whole soulmate thing. But as the story progresses, he meets this person who seems to be his soulmate. The story is great because it not only focuses on their relationship but also on how it affects the overall Supernatural world around them. There are elements of mystery as they try to figure out why their bond is so special.
First, you need to understand Gabriel's character. He's a trickster, so there should be elements of mischief and unpredictability in your story. For example, you could have him play pranks on other characters in unexpected ways. Second, study the Supernatural universe's lore. This will help you fit Gabriel into the existing world and make your story more believable. Third, create an engaging plot. Maybe have Gabriel on a quest to find a lost artifact that has significance in the angelic world.
Such a scenario could bring about a total upheaval in the supernatural order. It could cause other characters to step up and take on new roles, or maybe even lead to a truce among enemies to deal with the fallout.
In fanfiction, if Sam was kidnapped, it could lead to a very intense story. Dean would surely go on a rampage to find him. Maybe Sam was kidnapped by a powerful demon who wants to use him for some dark ritual. It could also be a new, unknown enemy who has a vendetta against the Winchesters.