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Zebra GK420d

What Zebra GK420d runs, at which resolutions, and where each claim comes from.

Labelixa printed and read back this model on real hardware — the evidence covers ONE device and ONE firmware, not the whole model line.

Specifications

Manufacturer	Zebra
Family	G-Series
Category	Desktop
Resolution	203 dpi
Print width	104 mm
Connectivity	USB, RS232, Parallel

Printer languages

Native means the printer's own language. Emulation means a separate, manufacturer-documented mode that accepts another vendor's language — useful, but not the same thing.

Language	Type	Evidence
ZPL	Native Printed on a real device on 2026-09-04 and read back from paper: QR / Data Matrix / Code 128 / EAN-13 / Code 39 decoded EXACTLY to the data sent. Scope: ONE device + ONE firmware; this is a DECODE test, NOT an ISO 15416 quality grade.	PHYSICAL_TEST Lab test on a real device (firmware V61.17.17Z) · 2026-09-04
EPL	Native Printed on a real device over Ethernet (TCP 9100) on 2026-09-08 and read back from paper: Code 128 / Code 39 / EAN-13 decoded EXACTLY to the data sent. The EAN-13 narrow bar was read as CLIPPED to the EPL2 limit (3 dots). Scope: ONE device + ONE firmware; this is a DECODE test, NOT an ISO 15416 quality grade.	PHYSICAL_TEST Lab test on a real device (firmware V61.17.17Z) · 2026-09-08

What this means in practice

ZPL, EPL is the printer's own language here, so jobs written for it run without a translation layer — the closest thing to a predictable result.

This body ships in a single resolution (203 dpi), which removes one class of surprise: a label written for it always renders at the same physical size, and a design made for a 300 dpi printer will come out roughly twice as large here.

Anything positioned beyond 104 mm of print width will not appear on the label; the compatibility checker flags this for the ZPL job you paste.

Tools for this printer

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