Datasheet for XC34064P wanted

You can find the pinout for this display and other nokia displays here and here.

It's likely to be the GC1604N0, which is the only textual 16x4 display now available by Goldentek.

Note that the part number you found seems not to be consistent with the usual coding of the manufacturer, as they use GC* instead of LM*.

Here there is their coding standard, which seems not including the 'LM*' code.

For understanding the interface you can try to use the block scheme, in which the pins should be displayed in the right order. The problem is that the board has 16 pins while the scheme shows only 14 lines: trying to find where is the supply turning the backlight on may be a way to go.