Add usage for GCS gateway, closes #4280
Add usage for GCS gateway, closes #4280

krishnasrinivas/minio,harshavardhana/minio,minio/minio,dvstate/minio,jimjag/minio,jimjag/minio,dvstate/minio,fwessels/minio,krishnasrinivas/minio,fwessels/minio,NitishT/minio,harshavardhana/minio,fwessels/minio,balamurugana/minio,aead/minio,abperiasamy/minio,krisis/minio,rushenn/minio,aead/minio,fwessels/minio,aead/minio,dvstate/minio,jimjag/minio,donatello/minio,dvstate/minio,harshavardhana/minio,abperiasamy/minio,krishnasrinivas/minio,donatello/minio,NitishT/minio,krishnasrinivas/minio,balamurugana/minio,aead/minio,rushenn/minio,vadmeste/minio,aead/minio,harshavardhana/minio,abperiasamy/minio,harshavardhana/minio,minio/minio,harshavardhana/minio,krisis/minio,NitishT/minio,jimjag/minio,rushenn/minio,aead/minio,abperiasamy/minio,aead/minio,vadmeste/minio,NitishT/minio,harshavardhana/minio,rushenn/minio,harshavardhana/minio,aead/minio