I have glcd 12864 with MCP23017 I2C
I can't find library or code for this module MCP23017 Expander 1602 2004 12864 LCD Driver Module I2C IIC Serial Interface Adapter Board Contrast Adjustment For Arduino
Any one help me
Contact the seller you purchased from.
We provide wiring diagram and for arduino sample code.
I see this on many pages on eBay, AliExpress.
It is extremely unlikely that your Ebay seller will even reply.
Post links to the actual display and adapter. If the web links do not have accurate photos, take your own photos of the "pcb side"
Someone might recognise the pcb and help.
As a general rule, a ST7920 GLCD is the easiest to use. It has a SPI interface. Just 3 GPIO pins.
David.