Really, this post shouldn't need to be published, but there are such an overwhelming number of questions in various GTA Online related fan communities about certain types of mods being allowed or not that it has become necessary. There is a very clear, easy to understand and all-inclusive guideline to modding in Online.
Don't.
While most players get that mods that give them an obvious unfair advantage aren't allowed, there are a typical few types of mods that keep coming up in questions along the lines of "is this an exception?" or "will this also get me banned?". Here's the thing: there are no exceptions, and all mods will get you banned.
Some of the most frequent offenders are FOV mods, graphics mods and real-life car mods. Now, while it may not be apparent, all of these affect gameplay in a way that imbalances the relationship between modded player and unmodded player.
The first one, the Field of View mod is the most obvious one. There's this thing where PC players (I too am guilty of this) are bummed out when the FOV in a game — meaning how wide your field of view extends around the character — is capped at 90 and cannot be adjusted.
Now, seeing as GTA 5 can be modded, FOV mods are there to solve this in single player. However when you go Online, things change. If you use an FOV mod, you'll have a direct advantage over people who don't, as you could potentially see them without them seeing you even if you were in the same relative position to one another. Seeing around corners others can't is another advantage posed by these mods.
