we can not help if you do not link the pattern. Sorry.
Basic sock patterns there are many. And we can not tell you anything about that specific pattern of yours without knowing it.
About gauge in general: knit a swatch (best work it in the round, so you work as if making a sock). measure on the swatch.
you want your sock fitting you (or whoever it is for): measure your foot at the widest part. Then deduct a little of that measure (an inch I usually do). That is the measure I want to achive. Then I caluclate my sock.
With your pattern we can probably help you more.