I'm not sure what you mean by a font name of Garmond (W1); do you mean Garamond?
Most modern LaserJet printers include the Garamond font (in four variants: Regular=Antiqua, Italic=Krsv, Bold=Hlb, BoldItalic=KrsvHlb ) as part of the built-in set of internal fonts.
Plenty of sites provide cheap or free TrueType format fonts; e.g. http://www.fontsquirrel.com/fonts/eb-garamond appears to provide a font in .otf format (OpenType being a superset of the TrueType format).
When a Windows font is used which does not have a printer-resident equivalent on the target device, many (most?) applications, in conjunction with the appropriate (Windows) printer driver, can generate a print stream which contains a dynamically-generated and downloaded soft font equivalent of the source document TrueType font; capabilities may differ between PCL5 and PostScript drivers.
I'm not familiar with the (quite elderly) LaserJet 4M, so don't know what internal font set is provided, nor what its capabilities are with regard to downloaded soft fonts, but it almost certainly supports some formats (which the printer driver should therefore be able to generate).