equivalent psp filter- maximum and minimum

[theycallmejayne]

I don't get the option to create a thread in the other area's, must be a new member limitation, so here goes and I hope this is the right place.

In photoshop there is a filter called "Other" that contains the following filters:

Custom, High pass, Maximum and Minimum and Offset.

I have not been using Gimp for long so don't know if there an equivalent for these filters already  in the software, but with different names, or do I have to add a plug in or script to add them?


If the latter can someone tell me which ones I need please?

THanks in advance.