How do I use more than 4 custom masks?

[Snoopy]

you can only use 4 custom sets, but you could use https://hashcat.net/wiki/doku.php?id=hybrid_attack where the dict just contains the chars from your ?5

OR in fact, your ?2 ?3 ?4 ?5 are a small keyspace (3*2*4*4=96 possibilities), why you dont build up a prebuild dictionary from these chars see hashcat utils combinator and just start with

dict1:
_
!
$
and dict2
G
g

combine them, combine the result with dict3 (your ?4), combine this result with dict4 (your ?5)

and then use this dict in hybrid attack see link above