diff --git a/SubmitFileGSD.sh b/SubmitFileGSD.sh
index 019b30d..20ea5a6 100755
--- a/SubmitFileGSD.sh
+++ b/SubmitFileGSD.sh
@@ -19,7 +19,7 @@ keepDQMfile=${14}
 
 ##Create Work Area
 export SCRAM_ARCH=${CMSSWARCH}
-source /afs/cern.ch/cms/cmsset_default.sh
+source /cvmfs/cms.cern.ch/cmsset_default.sh
 eval `scramv1 project CMSSW ${CMSSWVER}`
 cd ${CMSSWVER}/
 rm -rf ./*
diff --git a/SubmitHGCalPGun.py b/SubmitHGCalPGun.py
index 498b6c3..935e7ac 100644
--- a/SubmitHGCalPGun.py
+++ b/SubmitHGCalPGun.py
@@ -56,6 +56,7 @@ def createParser():
     parser.add_option('', '--storePFCandidates',  action='store_true', dest='storePFCandidates',  default=False, help='store PFCandidates collection')
     parser.add_option('', '--multiClusterTag',  action='store', dest='MULTICLUSTAG', default="hgcalMultiClusters", help='name of HGCalMultiCluster InputTag - use hgcalLayerClusters before CMSSW_10_3_X')
     parser.add_option('', '--keepDQMfile',  action='store_true', dest='DQM',  default=False, help='store the DQM file in relevant folder locally or in EOS, default is False.')
+    parser.add_option('', '--requestGPUs',  action='store_true', dest='GPU',  default=False, help='if used then it is set to True and will use in condor GPU machines, default is False. Keep in mind that GPU machines are limited in contrary to CPU.')
 
     return parser
 
@@ -483,6 +484,7 @@ def submitHGCalProduction(*args, **kwargs):
         write_condorjob.write('output      = '+outDir+'/std/'+basename+'.out \n')
         write_condorjob.write('error       = '+outDir+'/std/'+basename+'.err \n')
         write_condorjob.write('log         = '+outDir+'/std/'+basename+'_htc.log \n\n')
+        if (opt.GPU): write_condorjob.write('request_GPUs = 1\n') 
         write_condorjob.write('max_retries = 1\n')
         write_condorjob.write('queue \n')
         write_condorjob.close()