1. Create a local mount point:

 mkdir ~/clustermount

2. Mount the cluster directory you need:

 sshfs username@gateway.hpc.tu-berlin.de:  clustermount/ 

A path can be given after :. None uses the users home directory.
3. Your cluster home is now available at ~/clustermount
4. To unmount close all open files in ~/clustermount and leave the directory in the shell or your file manager. Then umount:

 fusermount -u ~/clustermount