guixt.ini in Mime Repository: We are using the SAP Mime Repository for storing the GuiXT scripts. Is it possible to also put the guixt.ini file into the Mime Repository?

Yes, it is. Please specify the RFC user and password in the local guixt.ini file and then use a SwitchTo command for the central guixt.ini:

RfcUser ...

RfcPasswordEnc  ...

SwitchTo  SAPMR:....