Tente isto:
#!/bin/bash
cd "/Server/Gen2"
options=()
tab=""
for file in *; do
[[ -d $file ]] && continue # not a file
[[ ! -x "$file" ]] && continue # not executable
options+=($tab --title="$file" -e "bash -ic \"nice -n 3 ./$file ; bash\"" )
tab="--tab"
done
xfce4-terminal "${options[@]}"