If you wish to add glyphs to the gates then you need to add this line to the Initialisation box in the properties of the stargate you place on the map. You will need to edit certain parts and I will explain what you need to edit and I will post a reference picture with the numbers that relate to the glyph symbols.
First things first, choose your gate. After that put this into the Initialisation box:
[this,"firstisland",[19,22,7,24,6,35],1,false,"0 setfog 0"] exec "\DSF_SG_DHD\sqs\CreateIdentity.sqs"
In this line you need to change "firstisland" to a name you want to give your gate. It must be different for each gate or they will not work.
You will need to change [19,22,7,24,6,35] to the numbers you want/the glyphs you want. (Image Attached) and the number 1 at the end is the Point of Origin. You can change this number to any but I advise that you use a number that you haven't used on this gate.
Remember that if your address is [19,22,7,24,6,35] and that gate's point of origin is 1 then when you dial into this gate, you do not use that point of origin, you use the POO of the gate you're dialling from which is shown on the top left of the DHD GUI that pops up to dial.