I am not sure, but isn't it a bit childish wanting to be on the top of the forum? You can always just bump your thread, and it will be shown on the FP untill someone else makes a new post in another thread.
@AAnonymous@crazyone& @Samatlewiss Have basically answered you. However if you are to update your gang thread and want to show the ALUK community stuff like new RP Stories, Gang promotions Etc. The best thing to do is just add a comment like UPDATED - 31/01/16 That is what most gangs do!