If you have a spreadsheet with names, ID and PW hashes you can make your own command set:
column 1 has Name, column B has ID and column C has PW-Hash
create this formula in D2 (the first data line) ="add user "&A2&" uid "&B2&" homedir /home/"&A2" <Alt> <Enter> set user "&A2&" password-hash "&C2&" <Alt> <Enter> add rba user "&A2&" roles adminRole
Replace the <Alt><Enter> with the key combination.
If needed you can change the adminRole to another or use another field to set the correct value.
Just make a copy of the column and paste it into a text editor, now you can copy and paste parts into a Putty session to the Gaia clish interface.
Regards, Maarten