Well you know … https://wiki.garrysmod.com/page/File/Read
If the file contents are:
On the first iteration to “aaaaaaaaaaaaaaaa”, second “bbbbbbbbbbbbbbbb” and so on …
Is it maybe ( I do not have access to Gmod right now … ):
local Line = "X" -- Just to be something while(Line) do print(F:Read()) end
… to print the lines sequentially ?