You can use a CLI with Input File script to add many nodes that you can deploy in the GUI. 
		
Procedure
-  
		  Create an input file with the node details. For example: 
		   
		  #Input file sample
SILENT = YES
SOURCEPATH = C:\SPP
DRYRUN = TRUE
[TARGETS_USER_1]
HOST = 192.168.1.1
HOST = 192.168.1.3
HOST = 192.168.1.2
UID = user1
PWD = user_password1
ILO_USERNAME=ilo username
ILO_PASSWORD=ilo password
[END]
[TARGETS_USER_2]
HOST = 192.168.1.4
HOST = 192.168.1.5
HOST = 192.168.1.6
UID = user2
PWD = user_password2
[END]
 
-  
		  Open a terminal window, navigate to the directory where SUM is located, and then issue the command: 
		   
		  smartupdate /inputfile <path:\inputfile.txt>(Windows)
 ./smartupdate --inputfile <path:/inputfile.txt>(Linux)
 
-  
		  Launch the GUI and manage the nodes. If the nodes were not added, verify that there are no issues with the Input File.