All references to numbers within the series are shown as numbers or spelled out. But no reference is given as to what they look like in Gorean.
However, Gorean numbers are indeed used in the Gorean language as shown by the following quotes.
The numbers on the lock were in Gorean.
Explorers of Gor    Book 13    Page 292
On the upper portion of my left breast something was written, inscribed there with a grease pencil. I had heard that it was the number "89." I could not read it. It was my lot number.
Dancer of Gor    Book 22    Page 108
On my left breast, on its upper portion, inscribed there with a grease pencil, in Gorean, was a number. I had been told it was "89," and that it was my lot number.
Dancer of Gor    Book 22    Page 113
I looked down at my breast, at what was written there, so boldly and brightly.
"Can you read?" asked a man, he who had said he was Teibar.
"No, Master," I whispered.
"You are an Earth female, are you not?" he asked.
"Yes, Master," I whispered.
"Perhaps, as an Earth female," he said, "you are not used to having your body written upon, for the convenience of men."
"No, Master," I said.
"But here you will grow used to it," he said. "Too, here, you are no longer, really, an Earth female. You are now no longer of Earth. You now belong to this world, ours."
"Yes, Master," I said. It was true. I now belonged to this world.
"Would you like to know what it says?" he asked.
"Yes, Master," I said.
"It is the number '89,'" he said. "It is the number of your individual sales lot."
Dancer of Gor    Book 22    Page 117
Each of us is marked, her lot number inscribed in grease pencil on her left breast. I was told that my number was 119. Barbarian slaves are commonly kept illiterate.
Smugglers of Gor    Book 32    Page 56
I had not noted the number, nor, as I was illiterate, could I have read it, had I noted it.
Plunder of Gor    Book 34    Page 257
