?
Neither a search on Google nor of Nvidia gave me any search results for NG37GL Quadro, only for other Quadro models. Are you sure of the model number? Might 37GL refer to the chip core, not the chip itself?
What have you tried? Does RHEL5.3 not include the nv or the vesa module, or does nothing load when you boot? What do you get when you try the command "dmesg" and "modprobe -c"?
More information is needed.
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